| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024i•o•dine /ˈaɪəˌdaɪn, -dɪn; in Chemistry also -ˌdin/,USA pronunciation also i•o•din /ˈaɪədɪn/USA pronunciation n. [uncountable]- Chemistry, Drugsa dense, violet-colored substance used as an antiseptic on wounds, as a nutritional supplement, and in photography.
WordReference Random House Unabridged Dictionary of American English © 2024i•o•dine (ī′ə dīn′, -din; in Chem. also ī′ə dēn′),USA pronunciation n. [Chem.]- Chemistry, Drugsa nonmetallic halogen element occurring at ordinary temperatures as a grayish-black crystalline solid that sublimes to a dense violet vapor when heated: used in medicine as an antiseptic. Symbol: I;
at. wt.: 126.904;
at. no.: 53;
sp. gr.: (solid) 4.93 at 20°C.
Also, i•o•din (ī′ə din).USA pronunciation - Greek īó̄dēs, origin, originally rust-colored, but by folk etymology, etymological taken as í(on) violet + -ōdēs -ode1) + -ine2; introduced by H. Davy
- French iode (
- 1814
Collins Concise English Dictionary © HarperCollins Publishers:: iodine /ˈaɪəˌdiːn/ n - a bluish-black element of the halogen group that sublimates into a violet irritating gas. Its compounds are used in medicine and photography and in dyes. The radioisotope iodine-131 (radioiodine), with a half-life of 8 days, is used in the diagnosis and treatment of thyroid disease. Symbol: I; atomic no: 53; atomic wt: 126.90447; valency: 1, 3, 5, or 7; relative density: 4.93; melting pt: 113.5°C; boiling pt: 184.35°C
Etymology: 19th Century: from French iode, from Greek iōdēs rust-coloured, but taken to mean violet-coloured, through a mistaken derivation from ion violet |